<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8">
    <title>Document</title>
  </head>
  <body>
    <script>
      function getSum(num1, num2) {
        console.log(num1 + num2);
      }
      getSum(1, 3);	// 输出结果：4
      getSum(3, 8);	// 输出结果：11
    </script>
  </body>
</html>